unhappy vs discontent

unhappy is not a noun while discontent is a noun.

Word	Noun	Adjective	Verb	Adverb
unhappy	No	Yes	No	No
discontent	Yes	Yes	Yes	No

unhappy (noun)	discontent (noun)
	a longing for something better than the present situation

unhappy (adjective)	discontent (adjective)
experiencing or marked by or causing sadness or sorrow or discontent	showing or experiencing dissatisfaction or restless longing
generalized feeling of distress
marked by or producing unhappiness
causing discomfort

unhappy (verb)	discontent (verb)
	make dissatisfied